JP2009108617A - Open-close device and device for forming image - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an open-close device bringing a third machine body to a closed posture to a second machine body even when the second machine body is opened under the state opening the third machine body. <P>SOLUTION: The center of rotation of a second gear 50 for a scanner housing 20 is further rotated in the direction of the arrow (d) while using the center of a first gear 40 for a printer housing 10 as an axis when the scanner housing 20 is brought to an open posture when the scanner housing 20 is brought to the state of the closed posture and a cover member 30 to the state of the open posture. Accordingly, teeth 50b for the second gear 50 for the scanner housing 20 is further engaged with the teeth 40b for the first gear 40 for the printer housing 10. Consequently, the second gear 50 is rotated in the direction of the arrow C1. When the second gear 50 is turned in the direction of the arrow C1, a third gear 60 for the cover member 30 is turned in the direction of the arrow B2. As the result, the cover member 30 is brought to the closed posture to the scanner housing 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing device between a plurality of airframes that are connected so as to be relatively openable / closable. The present invention relates to an opening / closing device and an image forming apparatus.

A conventional switchgear 5 is shown in FIG. A conventional opening / closing device 5 includes a first airframe 1, a first airframe 2 coupled to the first airframe 1 so as to be swingable between a closed posture covering the upper portion of the first airframe 1 and an open posture opening the upper portion, An opening / closing device 5 is known that includes a third body 3 that is connected to a second body 2 so as to be swingable between a closed posture that covers the first body 2 and an open posture that opens the first body 2.

The conventional opening / closing device 5 includes a hinge 7, and the second body 2 and the third body 3 open and close the first body 1 with the hinge 7 as a rotation center. (For example, see Patent Document 1)
Japanese Patent Laid-Open No. 9-185202

  However, as shown in FIG. 9, when the second machine body 2 to which the third machine body 3 is connected so as to be openable and closable is connected to the first machine body 1 so as to be swingable, the second machine body 3 is erroneously opened with the third machine body 3 opened. 2 Aircraft 2 may be opened. As a result, if there is a passage behind the opening / closing device 5, there is a danger of hitting a person, and if there is a wall behind, the third body 3 may hit the wall and break. Here, “open” means swinging from the closed position to the open position, and “close” means swinging from the open position to the closed position.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an opening / closing device and an image forming apparatus in which the third body is closed with respect to the second body even if the second body is opened with the third body open. It is said.

  In order to solve the above-mentioned problem, the invention according to claim 1 includes a first body, a closed posture in which one end is pivotally supported on the first body and the other end is closed with respect to the first body, and the first A second airframe that is pivotably provided in an open position that is open with respect to the airframe; a closed position in which one end is pivotally supported on the second airframe and the other end is closed with respect to the second airframe; In an opening / closing apparatus comprising a third airframe that is pivotably provided in an open posture that is open with respect to the airframe, the first airframe is fixed to the first airframe and has a center of rotation of the second airframe. A first gear is provided as a shaft, the second body is provided with a second gear rotatably attached to the second body and disposed at a position facing the first gear, and the third body is provided with a second gear. A third gear fixed to the third machine body and disposed at a position facing the second gear, and having a rotation center of the third machine body as an axis; The second body does not mesh with the second gear when the second body is in the closed position, and teeth are provided in a part of the range where the second body meshes with the second gear when the second body is in the open position. Teeth are provided on the entire circumference, and the third gear does not mesh with the second gear when the third machine body is in the closed position, and the tooth is partially within the range of meshing with the second gear when the third machine body is in the open position. When the second body is in the open position when the second body is in the closed position and the third body is in the open position, the second gear of the second body is rotated by the second body. Revolves around the shaft and rotates while meshing with the teeth of the first gear of the first aircraft. By the rotation of the second gear of the second aircraft, the teeth of the third gear of the third aircraft are rotated, and the third aircraft Is in a closed position.

The invention according to claim 2 is characterized in that the length of the tooth perpendicular to the radial direction of the first gear is longer than the length of the tooth perpendicular to the radial direction of the second gear and the third gear.

  According to a third aspect of the present invention, the first machine body is a printer housing having an image forming unit for forming an image, and the second machine body is a scanner housing having an image reading unit for reading an image. The machine body is a cover member for pressing a document placed on the upper portion of the scanner housing, and includes an automatic document feeder.

  According to the first aspect of the present invention, when the second aircraft is in the closed posture and the third aircraft is in the open posture, the third aircraft is in the closed posture. .

  Thereby, even if there is a passage behind the switchgear, there is no danger of the third aircraft hitting a person, and even if there is a wall behind, the third aircraft will not hit the wall and be damaged.

  According to the second aspect of the present invention, the length of the tooth perpendicular to the radial direction of the first gear is longer than the length of the tooth perpendicular to the radial direction of the second gear and the third gear.

  Since the second body is provided so as to be rotatable with respect to the first body, there is a slight backlash between the first body and the second body. By making the tooth length perpendicular to the radial direction of the first gear longer than the tooth length perpendicular to the radial direction of the second gear and the third gear, the second and third bodies are And is supported stably.

  According to the invention described in claim 3, the first machine body is a printer housing having an image forming unit for forming an image, and the second machine body is a scanner housing having an image reading unit for reading an image, The third machine body is a cover member for pressing the document table provided on the upper portion of the scanner housing, and includes an automatic document feeder.

  If the first machine body, the second machine body, and the third machine body are a printer housing, a scanner housing, and a cover member, respectively, and if the cover member is provided with an automatic document feeder, the cover member becomes heavy. In addition, since the printer housing is provided with an image forming unit, there are many opportunities to open and close the upper part for maintenance and paper jam release. Therefore, further effects can be realized by applying the switchgear according to claim 1 and claim 2 to the image forming apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an exploded perspective view showing the entire image forming apparatus 9 of the present invention.

  The image forming apparatus 9 is connected to the printer housing 10 so as to be swingable between a printer housing 10 (corresponding to the first machine body described in the claims), a closed posture that covers the upper portion of the printer housing 10, and an open posture that opens the upper portion. Scanner housing 20 (corresponding to the second machine body described in the claims), and a cover member 30 coupled to the scanner housing 20 so as to be swingable between a closed posture covering the scanner housing 20 and an open posture opening. 3). The cover member 30 is provided with an automatic document feeder 18 (hereinafter referred to as “ADF”; ADF: Automatic Document Feeder).

In the following description, “opening the scanner housing 20” means swinging the scanner housing 20 from the closed position to the open position, and “closing the scanner housing 20” means closing the scanner housing 20 from the open position. Oscillate in a straight line. The same applies to the cover member 30. In FIG. 1, the image forming apparatus 9 assumes that the upper left is the front, the lower right is the rear, the lower left is the right, and the upper right is the left.

  As shown in FIG. 1, the printer housing 10 is provided with a first gear 40 at the right end and a protrusion 45 at the left end in the vicinity of the rear end. In the embodiment of the present invention, the first gear 40 and the protrusion 45 are provided integrally with the printer housing 10, but separate members may be fixed to the printer housing 10.

  The first gear 40 and the projecting portion 45 are shaped so that a semicircle projects upward, and the first gear 40 is provided with teeth 40b in a partial range (described later). Further, the first gear 40 and the protrusion 45 are provided with holes 40a and 45a at the center of the semicircle, respectively, so that the holes 40a and 45a are aligned with each other in the horizontal direction.

Near the rear end of the scanner housing 20, holes 40 a and 45 of the printer housing 10 are provided.
First shafts 42 and 47 fitted to a are provided so as to protrude outward in the left-right direction. The first shafts 42 and 47 of the scanner housing 20 are connected to the holes 40 of the printer housing 10.
The scanner housing 20 is connected to the printer housing 10 so as to swing around the first shafts 42 and 47 by being respectively fitted to a and 45a. In other words, the scanner housing 20 is provided so as to swing around the center of the semicircle of the first gear 40 of the printer housing 10 as the center of rotation.

  Near the rear end of the right side surface of the scanner housing 20, a second gear 50 is provided at a position facing the first gear 40 in the vertical direction. More specifically, in the second gear 50, a hole 50a provided in the center of the second gear 50 is disposed at a position facing the hole 20a provided in the vicinity of the rear end portion of the scanner housing 20. 20 is rotatably mounted.

  In addition, teeth 50b are provided around the second gear 50, and the length orthogonal to the radial direction of the teeth 40b of the first gear 40 (the length in the left-right direction of the teeth 40b) is the second. It is slightly larger than the length orthogonal to the radial direction of the teeth 50b of the gear 50. Since the scanner housing 20 is swingably provided by fitting the first shafts 42 and 47 of the scanner housing 20 into the holes 40a and 45a of the printer housing 10, a slight backlash occurs in the left-right direction. Accordingly, the length of the first gear 40 perpendicular to the radial direction of the teeth 40b is made slightly larger than the length of the second gear 50 perpendicular to the radial direction of the teeth 50b, so that the scanner housing 20 is located relative to the printer housing 10. It is supported stably. The second gear 50 is provided only in the vicinity of the rear end of the right side surface of the scanner housing 20 and is not provided on the left side surface.

Further, in the vicinity of the rear end portion of the scanner housing 20, support portions 55 and 57 protrude upward in the vicinity of both end portions in the left-right direction. The support portions 55 and 57 are provided with holes 55a and 57a penetrating in the left-right direction in the vicinity of the upper portion, and the holes 55a and 57a are provided so as to be aligned with each other in the horizontal direction.

Concave portions 63 and 67 are provided in the vicinity of both end portions in the left-right direction at the rear end portion of the cover member 30, and support portions 55 and 57 of the scanner housing 20 are fitted in the concave portions 63 and 67, respectively. A third gear 60 is fixed to the cover member 30 with an adhesive or the like on the right side surface near the rear end of the cover member 30 at a position facing the second gear 50 in the vertical direction. In the embodiment of the present invention, the third gear 60 is provided separately from the cover member 30 and is fixed to the cover member 30, but may be provided integrally with the cover member 30.

The third gear 60 has a hole 60a passing through the center thereof, and teeth 60b (described later) are provided in a part of the range. A third shaft 62 is fitted into the hole 60a of the third gear 60, and the third shaft 62 is a hole on the right side end portion of the cover member 30 provided so as to face the hole 60a of the third gear 60 (see FIG. (Not shown) and the hole 55a of the protrusion 55, and is fitted into the hole 63a on the left side surface of the recess 63.

Further, on the left side surface near the rear end portion of the cover member 30, a hole 67 a provided at the left side end portion of the cover member 30 so as to face the hole 57 a of the support portion 57, and a hole 57 a of the support portion 57. Is inserted into a hole (not shown) on the right side surface of the recess 67. Accordingly, the cover member 30 is connected to the scanner housing 20 so as to swing around the third shafts 62 and 65. That is, the cover member 30 is provided so as to swing around the center of the circle of the third gear 60 of the cover member 30 as the rotation center.

  2 is a side view of the image forming apparatus 9 in FIG. 1, and is a view of the image forming apparatus 9 as viewed from the right side. 2 to 8, the left side of the drawing is the front side and the right side is the rear side. In FIG. 2, the scanner housing 20 and the cover member 30 are in a closed position.

  In the first gear 40, the second gear 50, and the third gear 60, the center position of each gear (the center of the first shaft 42, the pin 52, and the third shaft 62) is on the vertical line (on the line AA) in the vertical direction. It is arranged to be.

  The first gear 40 is provided with teeth 40b on the rear side with the AA line as a boundary. More specifically, in the first gear 40, the teeth 40b are provided in a range of about 90 degrees in the clockwise direction from a position slightly behind the AA line, and the teeth other than the teeth 40b are provided with teeth. There are no curved portions 40c.

  The second gear 50 is provided with teeth 50b as a whole and is rotatably provided to the scanner housing 20. In the state shown in FIG. 2 (the scanner housing 20 is in the closed position), the second gear 50 is stationary at a position facing the curved portion 40 c of the first gear 40.

  The third gear 60 is provided with teeth 60b substantially on the rear side with the AA line as a boundary. More specifically, the third gear 60 has a tooth 60b of about 180 degrees in a counterclockwise direction from a position slightly behind the line AA at a position where the third gear 60 and the second gear 50 face each other. The range other than the tooth 60b is formed by a curved portion 60c provided with no tooth. In the state shown in FIG. 2 (the cover member 30 is in the closed position), the second gear 50 is stationary at a position facing the curved portion 60 c of the third gear 60.

  That is, in the state of FIG. 2 (the scanner housing 20 and the cover member 30 are in the closed position), the second gear 50 is disposed at a position facing the curved portion 40c of the first gear 40 and the curved portion 60c of the third gear 60. Thus, the scanner housing 20 can be idled.

  FIG. 3 is a schematic diagram of the image forming apparatus 9. The document cover 13 presses the document M placed on the first document table 15 and covers the first document table 15 so that light other than the light emitted from the light source 23 does not illuminate the document M. . The document cover 13 according to the present embodiment is integrally provided with an ADF 18. The ADF 18 includes a motor, a control circuit, and the like that rotate a roller 19 that conveys the originals placed on the second original table 17 for placing a plurality of originals to be read at once. .

The scanner housing 20 accommodates a scanner unit 29 as image reading means. The scanner unit 29 includes a carriage 21, a scanning circuit board 26 on which the linear image sensor 22 is mounted, a light source 23, a lens 24, a mirror 25, a sub-scan driving unit (not shown), and the like. The carriage 21 is slidably supported by a rod-shaped carriage guide 27 fixed to the scanner housing 20, and reciprocates in the axial direction of the carriage guide 27 by a sub-scanning drive unit. The scanning circuit board 26 on which the linear image sensor 22 is mounted, the light source 23, the lens 24, and the mirror 25 are mounted on the carriage 21. The light source 23 irradiates the vicinity of the scanning line of the document placed on the first document table 15, and the mirror 25 and the lens 24 receive the reflected light image on the scanning line of the irradiated document by the linear image sensor 22. Form an image on the surface. The linear image sensor 22 is mounted on the scanning circuit board 26 in such a manner that RBG light receiving elements are arranged in a straight line in the direction perpendicular to the paper surface in FIG. The linear image sensor 22 outputs an electrical signal correlated with the density of the optical image formed on the light receiving surface. A circuit that drives the linear image sensor 22 and the light source 23, an AD conversion circuit, and the like are mounted on the scanning circuit board 26. When reading a document placed on the second document table 17, the sub-scanning drive unit moves the carriage 21 to a position indicated by a broken line in FIG. Since the linear image sensor 22 and the document N move relative to each other when the control unit described later controls the ADF 18 and conveys the document N, a two-dimensional image can be scanned.

  The printer housing 10 accommodates a printer unit 12 as image forming means. The printer unit 12 prints an image on a print medium by a monochrome laser method. In this embodiment, the case where printing is performed by the monochrome laser method is described, but printing may be performed by a color laser method, an ink jet method, a dot impact method, or the like. The printer unit 12 includes a photosensitive drum 31, a charge roller 32, a laser transmitter 33, a toner cartridge 34, a transfer roller 35, a pressure roll 36, a heat roll 37, a cleaner unit 38, a paper transport unit (not shown), and the like. The charge roller 32 charges the photosensitive drum 31, and the laser transmitter 33 emits laser light to form an electrostatic latent image on the photosensitive drum 31. The toner cartridge 34 contains a magnet roller and toner, and the electrostatic latent image is developed by attaching the toner to the photosensitive drum 31 with the magnet roller. A printing sheet 39 as a printing medium is conveyed by a sheet conveying unit (not shown), a heat roll 37 melts the transferred toner by heat and fixes it to the printing sheet 39, and a pressure roll 36 applies pressure to the printing sheet 39 to apply toner. Crimp the. The cleaner unit 38 removes residual toner on the photosensitive drum 31 that could not be transferred onto the printing paper 39. The printed printing paper 39 is discharged to a paper discharge tray (not shown) by the paper transport unit.

  The printer housing 10 accommodates a control unit (not shown). The control unit functions as both an image reading unit and a printing unit. The control unit controls the scanner unit 29 to read an original, and performs gamma correction, shading correction, etc. on the signal output from the scanning circuit board 26 to create image data. The control unit also performs halftone processing, resolution conversion processing, color space conversion processing, interlacing processing, and the like on the image data to create print data, and controls the printer unit 12 based on the generated data to generate a digital image. Let it print.

  Next, with reference to FIGS. 2 and 4 to 8, how the scanner housing 20 and the cover member 30 are opened and closed and the movement of the first gear 40, the second gear 50, and the third gear 60 will be described.

  Hereinafter, “rotate” means that the second gear 50 rotates about the pin 52 with respect to the scanner housing 20, and that the third gear 60 rotates about the third shaft 62. Say. However, since the third gear 60 is fixed to the cover member 30, the third gear 60 also rotates integrally with the movement of the cover member 30 rotating.

Hereinafter, as the rotation direction of the second gear 50 and the third gear 60, the direction in which the second gear 50 rotates clockwise around the pin 52 is C1, and the direction in which the second gear 50 rotates counterclockwise is C2. The direction in which 60 rotates clockwise about the third axis 62 is B1, and the direction in which it rotates counterclockwise is B2.

  First, with reference to FIG. 2, FIG. 4 and FIG. 5, a state in which the cover member 30 changes from the closed position to the open position will be described. 2 shows a state in which the cover member 30 and the scanner housing 20 are in a closed position, FIG. 4 shows a state in which the cover member 30 is slightly opened from the state shown in FIG. 2, and FIG. 5 shows a state in FIG. The cover member 30 is further opened.

  When the cover member 30 is slightly opened from the closed posture (the state shown in FIG. 2), the cover member 30 rotates about the third shaft 62. At this time, since the third gear 60 is fixed to the cover member 30, the teeth 60b of the third gear 60 rotate in the direction of the arrow B1 as the cover member 30 rotates. When the third gear 60 rotates in the arrow B1 direction, the tooth 60b of the third gear 60 is moved to a position where it engages with the tooth 50b of the second gear 50 (state of FIG. 4).

  When the cover member 30 is further opened from the state shown in FIG. 4, the teeth 60b of the third gear 60 further move in the direction of the arrow B1 (state shown in FIG. 5). When the tooth 60b moves in the arrow B1 direction, the tooth 60b of the third gear 60 and the tooth 50b of the second gear 50 mesh with each other, and the second gear 50 is rotated in the arrow C2 direction. The second gear 50 is provided so as to be rotatable with respect to the scanner housing 20 and is disposed at a position facing the curved portion 40c of the first gear 40 (a position not meshing with the teeth 40b). It rotates while idling with respect to 40 teeth 40b. In this way, the cover member 30 is opened with respect to the scanner housing 20, and when the cover member 30 is closed, the cover member 30 is in the closed posture by the reverse operation. The state shown in FIG. 5 shows a state where the cover member 30 is opened 90 degrees with respect to the scanner housing 20.

  Next, referring to FIGS. 4, 6 and 7, the operation when the scanner housing 20 is in the open position when the scanner housing 20 is in the closed position and the cover member 30 is in the open position. Will be described. FIG. 4 shows a state where the cover member 30 is slightly opened (a state where the angle α is opened) with the scanner housing 20 in the closed posture. FIG. 6 shows a state where the scanner housing 20 is opened from the state shown in FIG. 4 (a state where the angle β is opened).

  When the scanner housing 20 is opened from the state shown in FIG. 4 (the state shown in FIG. 6), the rotation center of the second gear 50 rotates in the direction of the arrow d about the center position of the first gear 40 as an axis. Here, if the scanner housing 20 is opened at an angle β, the rotation center of the second gear 50 is also rotated by an angle β around the center position of the first gear 40.

  At this time, since the cover member 30 is connected to the scanner housing 20, the cover member 30 is interlocked with the movement of the scanner housing 20. That is, the rotation center of the third gear 60 of the cover member 30 also moves by an angle β around the center position of the first gear 40 (moves in the direction of arrow f).

  Further, when the scanner housing 20 is opened at an angle β, the rotation center of the second gear 50 of the scanner housing 20 is rotated in the direction of the arrow d, so that the teeth 50b of the second gear 50 of the scanner housing 20 are the first of the printer housing 10. It starts to mesh with the teeth 40b of the gear 40. The state shown in FIG. 6 shows the moment when the teeth 50b of the second gear 50 of the scanner housing 20 mesh with the teeth 40b of the first gear 40 of the printer housing 10.

  FIG. 7 shows a state where the scanner housing 20 is further opened from the state shown in FIG. 6 (a state where the angle θ is further opened from the angle β). When the scanner housing 20 is further opened, the rotation center of the second gear 50 of the scanner housing 20 further moves (revolves) in the direction of the arrow d around the center of the first gear 40 of the printer housing 10. At this time, the rotation center of the second gear 50 of the scanner housing 20 further moves in the arrow d direction by an angle θ.

  Since the cover member 30 is coupled to the scanner housing 20, the rotation center of the third gear 60 of the cover member 30 is the same as that of the first gear 40 of the printer housing 10, as is the rotation center of the second gear 50 of the scanner housing 20. It further moves in the direction of the arrow f about the center position (moves by an angle θ).

  At this time, the center of rotation of the second gear 50 of the scanner housing 20 moves in the direction of the arrow d, so that the teeth 50b of the second gear 50 of the scanner housing 20 and the teeth 40b of the first gear 40 of the printer housing 10 further. Engage. As a result, the second gear 50 rotates (spins) in the direction of the arrow C1. When the second gear 50 rotates in the arrow C1 direction, the third gear 60 of the cover member 30 is rotated in the arrow B2 direction.

  That is, even if the scanner housing 20 is further opened from the state shown in FIG. 6 (even if the angle θ is opened), the third gear 60 of the cover member 30 is rotated in the direction of the arrow B2 by the second gear 50 of the scanner housing 20. It is done. That is, the cover member 30 is closed with respect to the scanner housing 20.

  For example, when a paper jam occurs in the printer housing 1 or when it is desired to replace each part or the like, maintenance inside the printer housing 1 can be performed by opening the scanner housing 20.

  At this time, even if the scanner housing 20 is in the open position when the scanner housing 20 is in the closed position and the cover member 30 is in the open position, the cover member 30 is not in contact with the scanner housing 20. Closed position. As a result, there is no danger of the cover member 30 hitting a person even if there is a passage behind the image forming apparatus 9, and even if there is a wall behind the cover, the cover member 30 will not hit the wall and be damaged.

  Furthermore, after the cover member 30 is closed with respect to the scanner housing 20, the cover member 30 is closed integrally with the operation of closing the scanner housing 20.

  Next, with reference to FIG. 2 and FIG. 8, a state in which the scanner housing 20 and the cover member 30 are simultaneously opened will be described. FIG. 2 shows a state in which the scanner housing 20 and the cover member 30 are in the closed position, and FIG. 8 shows a state in which the scanner housing 20 is in the open position with the cover member 30 in the closed position.

  In the state shown in FIG. 2, the second gear 50 of the scanner housing 20 is disposed at a position facing the curved portion 40 c of the first gear 40 of the printer housing 10 (a position that does not mesh with the teeth 40 b), and a cover member. It is arranged at a position (a position not meshing with the teeth 60b) facing the curved portion 60c of the 30 third gear 60.

  FIG. 8 shows a state in which the scanner housing 20 is in the open position with the cover member 30 in the closed position from the state shown in FIG. At this time, the center of the second gear 50 of the scanner housing 20 and the center of the third gear 60 of the cover member 30 are respectively in the direction of the arrow d and the direction of the arrow f with the center of the first gear 40 of the printer housing 10 as the rotation center. To turn.

At this time, the teeth 50b of the second gear 50 of the scanner housing 20 mesh with the teeth 40b of the first gear 40 of the printer housing 10 as it rotates in the direction of the arrow d. On the other hand, the third gear 60 of the cover member 30 is rotated in the direction of the arrow f in a state where the curved portion 60 c is disposed at a position facing the teeth 50 b of the second gear 50 of the scanner housing 20. That is, the teeth 50 b of the second gear 50 of the scanner housing 20 and the teeth 60 of the third gear 60 of the cover member 30.
The scanner housing 20 and the cover member 30 are in the open posture without being engaged with b.

  In the embodiment of the present invention, the first gear 40, the second gear 50, and the third gear 60 are arranged so that the center positions of the respective gears are on the vertical line (on the line AA) in the vertical direction. However, it is not limited to this. The center of the first gear 40 of the printer housing 10 is provided at the center of rotation of the scanner housing 20, the center of rotation of the third gear 60 of the cover member 30 is provided at the center of rotation of the cover member 30, and the first gear. The 2nd gear which connects 40 and the 3rd gear 60 should just be arranged.

  In the embodiment of the present invention, the first gear 40, the second gear 50, and the third gear 60 are provided in the image forming apparatus 9. However, the present invention is not limited to this. It can be a product, and can be applied to other parts as long as the fuselage is divided.

  In the embodiment of the present invention, the printer housing 10, the scanner housing 20, and the cover member 30 are described as being divided into three parts, but may be divided into four or more parts. In this case, the first gear 40, the second gear 50, and the third gear 60 may be provided on the upper three of the plurality of aircraft, or may be provided on the lower three.

  In the embodiment of the present invention, the first gear 40, the second gear 50, and the third gear 60 are provided on the right side surface in the vicinity of the rear end of the image forming apparatus 9. However, the present invention is not limited to this. Instead, it may be provided on the left side or on both sides.

1 is an exploded perspective view showing the entire image forming apparatus of the present invention. FIG. 3 is a side view of the image forming apparatus viewed from the right side. 1 is a schematic diagram of an image forming apparatus. It is the figure which showed the state which opened the cover member 30 a little from the state shown in FIG. It is the figure which showed a mode that the cover member 30 was further opened from the state of FIG. It is a figure which shows the state which opened the scanner housing 20 from the state shown in FIG. It is a figure which shows the state which opened the scanner housing 20 further from the state shown in FIG. It is a figure which shows the state which made the scanner housing 20 the open position in the state which made the cover member 30 the closed position. It is a figure which shows the conventional switchgear.

Explanation of symbols

9. Image forming apparatus 10. Printer housing (first machine)
13 ... Document cover 20 ... Scanner housing (second machine)
30 ... Cover member (3rd body)
18 ... Automatic document feeder (ADF)
40 ... 1st gear 40c, 60c ... Curve part 40a, 45a, 55a, 57a, 60a, 63a, 67a ... Hole 40b, 50b, 60b ... Teeth 42, 47 ... 1st axis | shaft 45 ... Projection part 50 ... 2nd gear 52 ... Pins 55,57 ... Supporting part 60 ... Third gear 62,65 ... Third shaft 63,67 ... Recess

Claims (3)

The first aircraft,
A second end pivotally supported by the first body with one end pivotally supported and a second end closed with respect to the first body and an open position with respect to the first body. The aircraft,
A third end pivotally supported between the second body and a closed position in which the other end is closed with respect to the second body and an open position in which the second body is open. In a switchgear provided with a fuselage,
The first airframe is provided with a first gear fixed to the first airframe and having a rotation center of the second airframe as an axis,
The second body is provided with a second gear rotatably attached to the second body and disposed at a position facing the first gear.
The third machine body is provided with a third gear that is fixed to the third machine body and disposed at a position facing the second gear, with the rotation center of the third machine body as an axis,
The first gear is not engaged with the second gear when the second body is in a closed position, and teeth are provided in a part of a range where the first gear is engaged with the second gear when the second body is in an open position. ,
Around the second gear, teeth are provided all around,
The third gear does not mesh with the second gear when the third body is in a closed position, and teeth are provided in a part of the range where the third gear meshes with the second gear when the third body is in an open position. ,
When the second body is in an open position when the second body is in a closed position and the third body is in an open position, the second gear of the second body is the same as that of the second body. Revolves around the pivot axis and rotates while meshing with the teeth of the first gear of the first aircraft,
An opening / closing device characterized in that the third gear teeth of the third airframe are rotated by the rotation of the second gear of the second airframe, and the third airframe is in a closed posture.   2. The switchgear according to claim 1, wherein a tooth length perpendicular to the radial direction of the first gear is longer than a tooth length perpendicular to the radial direction of the second gear and the third gear. . The first machine body is a printer housing including an image forming unit that forms an image,
The second machine body is a scanner housing having an image reading unit for reading an image,
3. The image according to claim 1, wherein the third machine body is a cover member for pressing a document placed on an upper portion of the scanner housing, and includes an automatic document feeder. 4. Forming equipment.